Add an element to a list, the output is none

Question

I'm very confused about a situation. Why I cannot assign a list to a variable. Can someone explain it to me?

a =[1,2,3,4]
b = a.insert(0,1)
print(b)

the output is

None

The `insert()` method does not return any value. You are inserting the element in list `a` — Haris, Aug 10 '18 at 16:24

score 4 · Answer 1 · answered Aug 10 '18 at 16:24

4

The insert() method only inserts the element to the list. It doesn't return any value.

answered Aug 10 '18 at 16:24

Jaydip Rakholiya

score 0 · Accepted Answer · answered Aug 10 '18 at 16:28

0

Adding to the replies that you got, if it is the list b that needs to be updated but not the list a, you should proceed as such:

a =[1,2,3]
b = list(a)
b.insert(1,20)
print(a, b)

answered Aug 10 '18 at 16:28

Matina G

2 Answers2